Abstract: In Three-North area of China,the curtailment of wind power is a serious problem,especially in winter,the High PressureIntermediate Pressure（HP-IP）bypass heating was proposed to decouple the close relationship between power and heat. Based on the power and heat characteristics of CHP plant with bypass heating system,a series of mathematical models of wind power accommodation were established. According to the peak regulating demand of power network,the operation strategies of CHP plant were given. Results show that the capacity of wind power accommodation and heating can be greatly improved by HP-IP bypass heating. In order to ensure the safety,the steam flow rate of HP-IP bypass should be matched. The capacity of wind power accommodation is the best by"traditional extraction steam + HP-IP bypass"heating. Taking a 330 MW unit as research object,the heating capacity increases by 90.56% using HP-IP bypass heating. At the rated heat load condition,the capacity of wind power accommodation increases by 324.46% using"traditional extraction steam+ HP-IP bypass"heating.